显影抑制剂对银盐CTP版材的提高反差作用

高反差是印刷用感光材料的重要特性.本文着重研究了4种化学显影抑制剂对银盐扩散转移型CTP版材反差的影响.结果发现,硫代水杨酸、2-巯基苯并噻唑、6-硝基苯并咪唑和苯并三氮唑等单独使用时,对版材反差都有不同程度的提高作用;而硫代水杨酸与6-硝基苯并咪唑配合使用时,得到了超高反差效果.通过计算,给出了各个抑制剂最佳浓度时的反差系数值.另外,利用线性CCD技术对物理显影过程的研究表明,添加抑制剂扩大了不同曝光级的显影诱导期和显影速率之间的差别,从而提高了反差.     

Multipartite State Representations in Multi-mode Fock Space and Their Squeezing Transformations

We present the continuous state vector of the total coordinate of multi-partlcle and the state vector of their total momentum, respectively, which possess completeness relation in multi-mode Fock space by virtue of the integration within an order product （IWOP） technique. We also calculate the transition from classical transformation of variables in the states to quantum unitary operator, deduce a new multi-mode squeezing operator, and discuss its squeezing effect. In progress, it indicates that the IWOP technique provides a convenient way to construct new representation in quantum mechanics.     

Stability of Nonlinear Wave of Kadomtsev-Petviashvili-Type Equation

For ion-acoustic waves in a plasma with non-isothermal electrons,the MKP equation is its governing equation.The instability of a soliton solution of MKP equation to two-dimensional long-wavelength perturbations is investigated up to the third order.It indicates that the one-soliton solution of MKP equation is unstable if v = -1wheras it is stable if v = 1 until the third order approximation has been considered.     

Three-Mode Cyclic Squeezed States Constructed via EPR Entangled State

We construct the three-mode cyclic squeezed states and analyze its squeezing property by using the technique of integration within an ordered product of operators and the natural representation of the two-mode squeezing operator in the Einstein-Podolsky-Rosen entangled state basis.     

Simplified Scheme for Testing Symmetrization Postulate for Photons

We propose a scheme for testing the small violations of the symmetrization postulate （SP） for photons in cavity QED. In the scheme, a degenerate A-type three-level atom is sent through a cavity field initially in a q-deformed coherent state. After an appropriate interaction time, the atom is measured by a state-selective detector. The probability that the atom makes a transition from one of the lower states to the other characterizes the violation of the SP. In the scheme, only one atom is required and classical fields are unnecessary, which is prior to the previous schemes.     

不同取代基的苯酰肼的感染显影及其机理

本文研究了五种苯酰肼化合物(通式为R-Ph-NHNH-COR')对卤化银乳剂感光性能的影响。利用循环伏安、气-质联仪等方法研究了苯酰肼感染显影的作用机理及其影响因素。实验结果表明,通过苯酰肼的感染显影可获得高感、高反差的效果,影响感染显影程度的大小,除了与取代基R,R’结构有密切关系以外,还与乳剂的种类、胶银比、苯酰肼在卤化银颗粒上的吸附等因素有一定关系。另外也发现苯酰肼衍生物取代基结构不同,其作用机理也不尽相同,从而进一步加深了对感染显影机理的认识。     

物理显影核和介质对银盐扩散转移影像质量的影响

在银盐扩散转移感光材料中,正像的形成是典型的物理显影过程。在这个过程中,物理显影核起着催化剂的作用^[1]。因此核的性质与影像质量有着密切的联系。另外,介质是制备胶态核不可缺少的保护体,不同介质对影像转移密度和色调都有显著影响。所以要提高影像质量,研究物理显影核性质和介质成份是很有必要的。     

12-钨磷酸及其盐的酸性与催化性能的研究

红外法研究结果表明12-钨磷酸Fe³⁺、Mg²⁺和Na⁺盐都具有L酸点和B酸点。用Benesi法测得10种12-钨磷酸盐的酸强度顺序为(Al³⁺、Fe³⁺、La³⁺、Cu²⁺、Cd²⁺>Zn²⁺>(Ca²⁺、Mg²⁺>(Na⁺、Li⁺,其酸量与抗衡阳离子的离子势和电负性大体成线性关系。还看出酸量与所含结晶水量有关。催化剂的酸量与其对异丙醇脱水反应和丁烯-1异构化反应的催化活性的关系表现出不同的特征,这可用“体相型”和“表面型”催化作用的不同特点来解释。